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no there is nothing secret here
well my linux system has around 40millisec before it dies out ... an interrupt gets triggered reading from GPIO pin within kernel space, but i needed to do a "sync" before it dies .... i know i cant jump to the user space and call it becoz the system is already dead
so was thinkin to do sync before the system actually looses all power.
Do u hav any suggestion regarding this....
Kind Regards

Sorry for answering delay.
Well, maybe I don't understand something, but what are you understanding under "sync"?
Well, I think that it help you: Linux arm PXA gpio programming. If not come here, please.

P.S. My English not so good. But I glad to exchange experience with foreign colleague.